Step 1 photobioreactor fed on wastewater makes algae biostock.Step 2 collect algae via filter belt, Step 3 focus very large parabolic mirror or mirror array on small chamber that reaches 500 degrees F. a screw pushes dried algae through at an adjustable rate bases on temp.Step 4 offgassing in chamber is carbon monoxide and hydrogen, called syngas, this is burned in a turbine after sodium is added, the turbine makes power and turns Co into Co2 and its exaust travels through an M.H.D and makes more power, a cathode removes sodium, and a catalitic converter changes Co into Co2 Exaust is cooled by either heating household water or maintaining optimal photobioreactor temp, gas is then bubbled into bioreactor to feed Co2.

System takes sunlight and captures carbon, then releases it, and catches it, so on and so forth...

_________________Let not the bindings of society hold you back from improving it.... the masses follow where the bold explore.

Hypothetically you could make it completely closed loop except for the solar. The "waste" of the syngas process get sent back to the bioreactor with the CO2 from the co-gen process as feedstock for the algae without needing any other inputs except to top off for leakage.

Of course the devil is in the details, and if you can avoid energy losses that make it less efficient than photo-voltaic or other more direct solar processes.